If you want to digitize 35mm slide film and colour negative, I'd recommend getting the Plustek - from what I can see from past scans, it is able to capture a bit more detail (especially in the shadow areas) than the Epson.
I shoot slides mostly and have been using the Konica Dimage Scan Elite 5400. Got it from a fellow Clubsnapper for $600 - for me it's like the best 35mm film scanner you can get out there and the amount of detail it can capture is amazing.
Feel free to have a look at some of my scanned slides bellow:
If you really want good scans on film I would say the following scanners are among the best in the market
1. Nikon Coolscan 9000 - very good and can handle 120 and 220 medium format film. Most expensive of the lot. Can do true 4000 x 4000 dpi. Can also do wet scan with glass plates
2. Minolta DiMage Multi Pro - as good if not better than the Nikon Coolscan 9000. True scan of 4800 x 4800 dpi. Also can do medium format
3. Minolta DiImage Scan 5400 I or II - True 5400 dpi. Very good scanner
4. Canoscan FS4000 US - Very cheap but very good scanner
All these scanner are now not in production and can be bought on the eBay market place. You can use Vuescan on a new PC to do the scanning. Steep learning curve but worth it. If not then get a cheap old Windows XP PC and you are ready to go.
You can go to my website to look at the scan photos at Zenfolio | Tripping the Light
Plustek if you shoot 35mm only, Epson if you shoot MF or LF. I have the 7600, great scanner. Flatbed is a bit more convenient though, but adjusting negative holder can be quite troublesome.
New plustek 120 is rumoured to be about $2k +, looks good.