Can I get these feature in opencart with or without mods

Im building a new site I want to know if I can get these in opencart with or without mods ?

also would it be ok to use RC2 on a live site or should i still stick with 1.4.9.5

Compare products
Reward Points System (already available in opencart 1.5) not sure about 1.4.9
RMA System (already available in opencart 1.5) not sure about 1.4.9
Grid, List Product listings (already available in opencart 1.5) not sure about 1.4.9
Gift Voucher System (already available in opencart 1.5) not sure about 1.4.9
Credit System(already available in opencart 1.5) not sure about 1.4.9
Reorder System (already available in opencart 1.5) not sure about 1.4.9
Affliate System (already available in opencart 1.5) not sure about 1.4.9
Banner Manager (already available in opencart 1.5) not sure about 1.4.9
One-Page Checkout (already available in opencart 1.5) not sure about 1.4.9
The ability to have diffident price for retail, wholesale, normal customer
A blog or forum something to get more SEO

I wouldnt really use RC2 for a live site, not until a more stable version is released anyway.
but in answer to your questions

Compare products (mod is out there for this)
Reward Points System (mod is out there)
RMA System (Not sure if a mod has been made)
Grid, List Product listings (yes with a mod)
Gift Voucher System (not sure if a mod has been made)
Credit System(with a mod)
Reorder System (with a mod)
Affliate System (with a mod)
Banner Manager (with a mod)
One-Page Checkout (dont think so)
The ability to have diffident price for retail, wholesale, normal customer (yes already can do in 1.4.9.5)
A blog or forum something to get more SEO (can find a mod in extensions)

Looks like with a mod you can get a shopping cart

Hello guys,

We have made the one page checkout available for the OpenCart 1.4.9.x versions.

http://www.opencart.com/index.php?route ... on_id=2830