mga car audio gods,

didnt want to start a new thread so i'll post here na lang po. im in the process of upgrading my car audio and need some opinions.

may rockford fosgate na ako na rear speakers. getting a new HU na rin pioneer 4050 or 5050.

questions ko po:

1. do i need front speakers? any suggested brands na budget friendly?

2. what's a good but budget friendly amp brand that i can use? targa?

planning to get the items from my dad's friendly neighborhood audio shop (he's buying hehe) then install sa iba (maybe jeff tan so i can ask for budget for a good sub).

anyway, responses will be gratefully appreciated.