dual 2 ohm wired to 4 ohms when i get the other one hoping to run back down to 2ohms

I actually live in Vancouver right across the bridge haha but my budget as of now is low but im saving money i was just wondering what the best amps would be to run im looking to get 2 sets of component speakers of the PG RSD5CS and then for the bass i will be running 2 RSDC10 and im thinking about ...

Ok so im kinda new to all this stuff iv had a few systems but i never really understood them just liked what i had iv always liked PG for alot of reasons anyways i have a rsdc10 that i love so im planning on getting another because i love the tightness of the 10s but i have no clue what kind of amp ...