Replace my HTPC or Gaming PC? Or merge both?

[contentedbloke]

I have a PC which I'm currently using as a HTPC running XBMC. The specs are as follows:

Intel Q6600 quad core processor
Gigabyte GA-EG45M-UD2H motherboard
Seagate 2 TB Hard drive
ATI HD 5850 card
3 GB DDR2 RAM
Windows 7
Logitech MK 250 wireless keyboard and mouse

I was using this system for gaming and then decided to connect this to my home theater through HDMI (on the ATI card) and started using it as a full fledged gaming system.

Now, I'm miss playing my games and want to start again. What prevents me from using my current system is that there is always a lag in the wireless keyboard and mouse which makes it unsuitable for any kind of gaming. I believe this is because of the auto-off functionality of the keyboard/mouse feature of Logitech. And the system is too far away placed to use a wired keyboard/mouse. Plus I only have couches and do not have a desk on which I can place my keyboard/mouse to play games (which is a must for playing Call of Duty or Warhammer games).

1. Can you suggest some other way of using this PC for playing games? Possibly a better wireless keyboard / mouse which will not have lag?

2. Or should I build a separate HTPC using an i3 sandy bridge and H55 chipset and use the above system for my gaming?

3. Or should I buy a ATI 5450 card and use it with the above system and instead build a i5 sandy bridge system for my gaming PC which will utilize my current ATI 5850 card?

Much appreciate any suggestions.

 

[Outlander_04]

Im using a wireless Ms keyboard and if theres lag I cant detect it .

Its microsoft wireless keyboard 1000 .
Not even a gaming board and it works fine .
It came with a mouse that sucked so badly I threw it away

 

[contentedbloke]

Im using a wireless Ms keyboard and if theres lag I cant detect it .

Its microsoft wireless keyboard 1000 .
Not even a gaming board and it works fine .
It came with a mouse that sucked so badly I threw it away

So what mouse are you using at present to play games?