I have a Nikon Coolscan V ED which I scan 35mm on. I'm not sure if this works with 120 film.
considering the amount of slides, it would be more beneficial to buy a scanner and do it all at home. Will have a look around on ebay just incase there is a bargain to be had,
I see that the epson v500 comes with elements 4, I assume that is a good piece of software to work with if needed?
I have the Canon 8800F and it's more than acceptable for scanning 35mm neg/slide and 120 neg/slide. I was having a lot of trouble with it (but still getting alright scans) until I recently discovered the Silverfast disc that came with the scanner and using that software the quality--especially the colour quality--of the files is fantastic.
Silverfast SE ... with the most convoluted upgrade/tradeup provisions I've ever witnessed