Default [Q] Custom roms and after rooting help/advise

Hello brothers, first of all i like to thank all who helped me root my device (HTC ONE V),
now that i have rooted my device (superuser), i want to avail the benefits of it but so far i am lacking in proper guidance.
so i have a couple of questions to which i want help with ..

1) i want to remove htc sense stuff which slows my device (takes up ram) and control whats in my ram and increase cpu speed.
2) i would to install a custom rom/kernal but i dont know which one is the most suitable for me ( i want which give max performance n stats etc etc) and does installing rom formats your apps and data ??
3) i saw this rheosoft ram expander software and there is this internal storage app as well, so i want to do both with my sd card ( 8 gb ) and yet have space for my regular use.

i would really appreciate if anyone can guide me even in one of my questions.
Thank you