Join Date: Mar 2006
Location: Northern Ireland
Re: buying a rg2550e
(a) unless you're 100% happy with your amp, i'd suggest looking into a new one of those, preferably (i.e. definitely) with valves.
(b) dimarzio are horribly expensive in the UK. You can get swinesheads (handwound, dimarzios aren't) for just over half the price (£45) each, and IMO are better than dimarzios, unless you're after a very specific tone (i.e. if you're in a vai tribute band, you'd want evos, for example, or for a satch tribute band you'd want a fred). And for not much more than dimarzios, you can get bareknuckles, which are generally regarded as being one of the best sets of pickups you can buy, again, unless you're after a very specific tone that you want a specific model from the dimarzio catalogue for.
seeing as how you say you want to play almost everything on that one guitar, I'd say either BK's or SH's are the way to go.
what's your budget? flexible? (i assume so, since you were willing to go for a js1000)