So, you're actually choosing between buying an amp, or two guitars?
I've never heard of a Peavey 6550 actually. I only know the 6550 tubes.
I can only talk about the guitars...
I'm not a big fan of Explorer model guitars; most of them sound like crap in my opinion. Only the original Gibson Explorer sounds pretty good. They're annoying to play while sitting, but ... ofcourse, they look cool
If you're buying LTD, I would first of all recommend going for an ESP, instead of LTD, but if you're still going for LTD, I'd really buy the EC500 model. They are pretty heavy, but because of the heavyness have a really nice sustain and 'ballsy' tone.
Fender Stratocasters still are one of the best guitars on the planet.. Unfortunately also one of the most popular. Because of this, there are THOUSANDS of shitty Strats out there. The only way to buying a good Strat (or Telecaster for that matter) is visiting lots and lots of stores and playing on them, and listening to their sound. One day you'll find one, which sounds great and plays great. This is why most guitarists stumble across their best guitars / Fenders by accident.
If you're going for a Fender, think about buying a custom shop and / or relic. They are unbelievably expensive, but sound and play as good as guitars come.
Good luck with the guitar / amp hunt, and ofcourse, when you buy something, I'm very curious about the pictures
