A V700 is the way to go. I don't know that you'll find a drum scanner these days even in a lab, Nikon film scanners are obselete and I think don't work with Win7-64 and an Imacon costs about $10,000. An Imacon would give you close enough to full resolution which if you were shooting Velvia with impeccable technique and equipment is probably around 4,000dpi or possible a little more. A V700 will give you probably 2,500dpi, maybe up to 2,800dpi, good enough for an A3+ print. The claimed 6,400dpi resolution is theoretical not actual. A cheaper Epson scanner is not a good idea because even though the scanning engine and the quality will probably be the same, you will waste too much time scanning say one strip at a time. Scanning is always time-consuming.
The standard Epson software is likely to be good enough. You may get a bit more with Vuescan (eg multiscanning) but the extra $80 is probably not required. You may get a bit more again from Silverfast
AI Studio (eg better multiscanning and may be better for negs) but that's quite quite expensive and there's a significant learning curve. Cheaper Silverfast options are likely to be a waste of time. If you really want to get adventurous and experimental in search of better scanning quality, wet-scanning is a possibility. I've never tried it myself and it's likely to be time-consuming; I doubt you'd want to but I should be able to find some links if you do.
I don't think getting scans done is a good idea. Either it'll cost too much or the quality probably won't be that good (and it may still cost too much) and you're losing control of the process.
So, likely recommendation in summary: V700 with standard Epson software. You'll want to scan without clipping highlight or shadow detail, generating a somewhat flat file somewhat like a RAW file, then optimise in Lightroom or Photoshop.