Can Anyone Reccommend A B Amplifier?

OK so im looking for a good b amp. Something between 25 - 50 watts (preferably 25). I want something that sounds good with pretty much any b you own (mines not the best but I really wanna new amp before i get a guitar). The main styles i play are rock and metal (Iron Maiden, Metallica, and Children of Bodom) but I would really like something with a nice tone (a warm sound when played clean). Some of the companies I have looked into have been Line6, Crate, Marshall, Randall, Vox, and Ampeg. Also I'm only looking to spend around $400 (mabye $500 if its really special) so if you could reccommend something in my size and price range that would be awesome....Thanks for your help :)