Hello,
I can recommend microtronix, been a happy customer for almost a year now.
I have only the smallest vps but it has great performance for its low price.
Hope you don't mind, some numbers:
# ./bench.sh
CPU model : Intel(R) Xeon(R) CPU E31270 @ 3.40GHz
Number of cores : 4
CPU frequency : 3392.459 MHz
System uptime : 102 days, 11:14,
Download speed : (11,2MB/s) (http://cachefly.cachefly.net/100mb.test)
I/O speed : 97,9MB/s (dd if=/dev/zero of=test_$$ bs=64k count=16k conv=fdatasync)
# ioping -c 5 /
4096 bytes from / (simfs /dev/simfs): request=1 time=0.1 ms
4096 bytes from / (simfs /dev/simfs): request=2 time=0.1 ms
4096 bytes from / (simfs /dev/simfs): request=3 time=0.1 ms
4096 bytes from / (simfs /dev/simfs): request=4 time=0.1 ms
4096 bytes from / (simfs /dev/simfs): request=5 time=0.1 ms
--- / (simfs /dev/simfs) ioping statistics ---
5 requests completed in 4004.3 ms, 8834 iops, 34.5 mb/s
