hi i'm a newbie in Sony Alpha system bought a Sony A-300 with dual kit and loving it..
if you screen through all post by me you would see from the forum's BnS that i have used the 350D,30D,D200 and some assortment of lens from both CAMP C and CAMP N. This is not due to i am very rich ;p or itchy

to keep on changing systems but it is because i was working for different photographers in the past 6 years and as such wanted to learn as much as possible. At that time many of the commercial (read successful photogs) were either using C or N. But due to high competition especially in small, sunny Singapore, I couldn't branch off myself and thus have to totally forget about going commercial. Now I am working in a full time job and doing freelance asst. photog to a photog who uses Olympus System. My point is
1) In SG majority of the commercial photogs uses C or N for many many years, at that time
didn't have sony or the marketing power of Sony(Konica Minolta).
2)During my stint as a assistant somehow i can never afford or save up enough or justify based on my pay to buy any of the f 2.8 lens that both camps offer be it normal or with IS/VR.
This time round I bought my DSLR not as someone who want to be a successful commercial photog but a newbie buying into a system. Photography is still much of a passion for me but cashflow is also a major concern.
So why SONY Alpha?
1)Dual Kit was going for, at very affordable price with lots of free gift
2)Nothing beats having (IS/VR) but having SSS(SuperSteadyShot)/IS/VR built into the body thats a killer. Imagine Sigma 70-200 2.8 HSM with SSS, 120-300 2.8 HSM with SSS, 300 2.8 HSM with SSS. I guess like what have been said for like endless times, ANY LENS ALSO GOT IS/VR (third party especially).
3)Image quality is really good for me since the biggest i would print would be A3 size. And so far there isn't any problem regarding IQ, Noise or anything. I must say its quite comparable to my D200 so I have no complaints.
4)Form factor and weight. Buying DSLR this time round is for hobby and to take photos when out with my family. I remember when i was lugging around my neck the
a)C 350D with 18-55 - this combination was good lightweight but due to the large
EF/EFS mount and small grip, it really is uncomfortable (i have big hands :embrass

b)C 30D with 17-85 is - this combination was good in terms grip but weight wise was a
a chore
c)N D200 with 18-135 - this combination to me is the most excellent but weight was
really,really unbearable
The above examples is based on shooting for casual hobby, street shooting, scenery and casual shooting of family, kids when out for a walk or picnic.
lugging the Alpha A300 with 18-70 around my neck is definitely much lighter than D200&18-135 and at the same time gives me almost the same grip/hand holdability.
Why not other makes with built in shake reduction?
Camp O - i just can't get use to the 4/3 format, smallish view finder (really personal preference :sticktong)
Camp P - Well this was the other close competitor which i nearly wanted to get especially since used K20D was going at very attractive prices at BnS what stopped me short was the change of distributor.. warranty coverage (its just a feeling of unsureness that was bugging me in the P system).
Now what if i wanna try my luck at being a successful photog AGAIN?
Sony has a good line of DSLRs now and a vast variety of lens and even PRO BODY A900 has SSS
ps: I am not saying that Konica Minolta don't have successful photographers, maybe the marketing is not there or i was having selective hearing only can hear C or N :angel:
At the end of the day Sony won me over with affordable price,in body shake reduction,reliability(service center), weight over function ration and many more..
These are only my opinion and my experience with getting a DSLR please do not flame me just sharing my journey.
The only thing I'm concerned about is using flash on alpha system which i haven't tried.
On N's system flash was a bliss and CLS was a charm
Anyone can share about flash photography with Alpha system compared to N's CLS??