After I got BF3 on PS+ I decided to get back to GIMX

I've done some preparations:
Hardware:
- fast laptop (from work) with 2x USB 3.0 and 2x USB 2.0
- slower home laptop I used to test previously
- fast flashdrive Transcend Jetflash 780 16GB
- EMTEC Bluetooth with bluecore 4 (the same as previously) but now I have ordered recommended from DX http://dx.com/p/ultra-mini-bluetooth-2- ... ngle-37665
I divided flashdrive to 2 partitions, 1x ntfs visible to Windows and standard ext4 + swap for Ubuntu.
I put Ubuntu 13.04 to Flash Drive (not live USB but full upgradeable installation) and installed GIMX.
Note: Flashdrive has to be put to USB 3.0 port and no other USB device should be connected to other USB 3.0 port to avoid hardware lags.
I can confirm system works flawlessly from USB - no lags, no hangups, everything is perfect.
Unfortunately GIMX works more or less the same as before - works fine for some time and suddenly gets lags or unresponsive. I suspect it's BT dongle's issue.
As I want to exclude every possible hardware lags, I suspect my bluetooth is faulty so here goes my question:
Is that Bluetooth from DX http://dx.com/p/ultra-mini-bluetooth-2- ... ngle-37665 still recommended and works longer than 10 minutes without lags? As I'm waiting for it to be shipped

What version/distribution of linux/ubuntu is tested and recommended for GIMX?
Is Ubuntu 13.04 tested and OK?
Ubuntu 11.04 ?
Ubuntu 12.10 ?
x32? x64 ?
Some other distro maybe?
I'm hoping to get GIMX finally in working order.
Regards,