sure sir, hall road, sajid radio, laser audio, or bobby car audio in cavalry, near moon banarsi.
yes if you really want to listen to the crisp quality then install an amp, otherwise these would sound good with your headunit as well, but not upto the mark, would be better than your current setup for sure.
as explained by maddy bhai, it isnt an issue to run pioneer comps on a sony hu, mixing an matching doesnt bother if the goodies are of good quality, also if you do not wish to install a sub, get the 6902r's or wire your current speakers with an amp..would serve the purpose.