harmonycentral.com is a great place to check out reviews. If you just wanna know what's available for under $500, go to musiciansfriend.com and do the sorting from lowest priced to highest.

I don't play metal so I can't make a suggestion based on the tones you would want.. but as far as a good quality amplifier, Ashdown is an awesome brand. I play through an Ashdown and my youtube channel gets a ton of comments on how good my tone is. I've also been looking in to a brand called Acoustic lately and they sound amazing.
I'm not a fan of facts. You see, the facts can change, but my opinion will never change, no matter what the facts are. - Stephen Colbert

Metal? What else is new. If you're just starting, get a Crate or a Gallien Krueger Backline.
Schecter Stiletto Studio 5
Ibanez SRX2EX1
Gallien Krueger 1001rbii
Gallien Krueger Neo 410
Look into ashsdown hatke and peavey they all make resonably priced amps. I reckon an ashdown mag 1x15 series will do you good.
Yamaha TRB1006
Fender MIA jazz bass
Hora Hybrid double bass
Hartke lh 500
Ev 606L
Epiphone les paul
Ashdown is great for low end, which is definately needed for metal.

Fender Geddy Lee Jazz
Warwick Corvette $$
Rockbass Streamer Fretless
Hartke HA5000
SWR Triad

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