Im considering getting 2 subs and an amp this summer. Im planning on buying 10" subs preferably from JL audio. The next question is what amp should i get to suport the subs.

They are kinda expensive so what would be another brand thats almost as good but less money?

My head unit is a sony cdx model. I forget which one but it plays mp3 disc and cost 350 retail (250 ebay ) And all my speakers are Alpine i think the S ones. Im also gonna change my tweeters soon.

Is it hard to install amps and subs?