PSU Capacitors

I've got a couple of old DEC machines which look like they could use new filter capacitors in the power supplies: I tried reforming the originals, and in some cases it worked, but there are also a few which look like they'll never see full capacity again. These are electrolytics, with 160,000mf/20v/24v surge and 57,000mf/50v/65v surge being the original values. Soooo here's my two questions: -Where would you recommend buying new ones? Anyone have a capacitor vendor they're particularly fond of (or particularly loathe)? -Does it make better sense to replace these with electrolytics, and have the same characteristics (and the same problems over time) as the originals, or is there some more modern cap-technology which would give the original's performance but with a better lifespan? I'm not up on my capacitor technology. :) Any help or suggestions would be welcome. Thanks! -O.-