From the stability, signal strength, prices, etc. to consider it:
Stability: PCI> PCMCIA> USB
Signal Strength: PCI> PCMCIA> USB
Price: PCI < PCMCIA <USB
There is no signal problems, then recommend the election desktop PCI, notebook PCMCIA Recommended
Mini PCI Wireless Card is to be installed inside the computer, the advantages of: stability. Disadvantages: Fixed single use, although the signal a good point (multi-antenna ah), but there are limitations
USB, direct access outside of advantages: convenience, USB extension cable on the signal can be slightly better the shelter, notebooks, desktop computers can be used. Disadvantages: hot and loud, the signal slightly worse than the
Mini PCI E Bluetooth Wifi (non-absolute, depending on the case).