I love stainless frets. I have them on 3 of my 7 electrics. The others will get them when it's time. You won't have to worry about a refret any time soon with ss frets, either. I'm not sure why anyone wouldn't get them... although the tech I use does complain a little that they're a pain to work with. Worth the extra $20 to me though.
Warmoth has a great page profiling fret sizes. I've found that their dimensions listed should be used as a ballpark measurement, as most frets vary a little depending on the distributor.
I'd recommend a new (bone) nut install at the same time - it will need to be cut for the new setup.
Ask around for good tech references. Even then, check out the guy's work if you can. Where I live, there are two ex-PRS guys that are highly recommended. One (www.philtone.com) did a complete SS refret on a Gibson for me last year, and the work was impeccable. He was moving his shop and unavailable earlier this year for some other work, so I took that to the other ex-PRS guy. I was really disaspointed with his work, even though he spent 20 years with PRS, and charged considerably more. Lesson learned on my part.
Ask if the tech has a PLEK machine. Check out his previous work: Look for mirror like finishes on the frets, nice clean ends, consistency on the entire fretboard, and play every single note on the guitar to see if there are dead spots. Bend all the notes, too. See if the tech is willing to take some time to watch how you play, and see what YOU want for your setup. That second guy I talked about did what HE wanted... and didn't have any time to sit with me when I went to pick up the guitar.
Figure around US$300 for a refret.
Let us know how it goes.