Good advice ^^^^  be aware of what you're buying when you buy in the second hard market. 
 
I have had good experiences in buying used musical gear, for the most part, but with software based gear, be sure, 100% sure it's compatible with your current rig.
 
You can find some audio interfaces under $200. If the midi gear you own uses USB, you don't need the interface to have Midi capability. The software recognizes the inputs, and the interface works the audio like it's supposed to do and life will be good.
 
One thing I always say about interfaces is this: It is the heart of your home studio. So, save a few dollars more if the interface you want and need, to do what you do, costs more than you have in the budget now, rather than buying something less than what you want and ending up having to replace it up the road.  Does that make sense?

Hi guys yes i already know this i have GNX4 that is not compatible with win8.1 i am busy checking reviews  and compatibillty issues with the items i am watching on ebay i have been on Amazon too asking owners for 8.1 issues i i don't need anything to big just to connect my guitar and master keyboard i don't even really need a mic input  my music tends to be more instrumental  i am a big Satchy fan

dredshred
 and a couple of Lexicon Lambda 24bit usb interface there about £30 on ebay which would get me up and running till i can afford something more high end 

Don't fall for the Lexicon units(any of them). They are USB1, and their latency is only marginally better than what you are experiencing now. At best, they are mildly annoying.They are cheap, even new, for a reason.
I can't speak for the Apogee, as I have not had any direct experience with it.
 

ARRGH already picked up  a Lexicon  alpha then got the news dont touch them i did get 5 replies back from Amazon customers that have one and they all said they were happy with it several said no issues with win8.1 so i bought one £30  listed as used once ,mmm maybe that should have warned me off  if it is useless i will just offload it on ebay i had plenty of bids against me so should be able to get rid of it if i have to will let you all know how i get on with it