I mean you no i know all about these lol why not just message me :/
There are
RGH = $150
J - TAG like $75 - $150
AND
R JTAGS $100 - $150
they are all the same basically i would get an RGH because they wont red ring and like shit on your face.
The games you will be able to host on without going online with a server are Cod 4 Cod 5 and Cod 6 only games that have system link infections and crap.
To get online you will need to pay for a kv witch are like $20 then the server to get online is $20 per day and that to go online with the RGH / JTAG
What lol yes there is chipset they use the motherboard what how you set it up RGH is going to be 100000x better then any Jtag