Advice needed on Wireless Network Card (amongst other things)

Hi, I am new to this site!

Ok,

So I am with Telstra Clear Cable (NZ) and have a Telstra Cable Modem, hooked-up to a Linksys WRT-54GL, running the Linksys firmware at the moment. Also attached is a Linksys NSLU2 NAS device with a couple of hard drives.

Basically, what I want to know is, how can I obtain excellent wireless reception on my laptop. My Toshiba A-100 Series laptop wifi in-build is CRAP. In only ever get fair (and good when I'm literally next to the Router). This is really bad for streaming video off the NSLU2 etc, not to mention simple things such as surfing the web.

I should point out that my friends who use it get "excellent" reception, and good at worst. So this must be a crap WIFI card which is in-built.

Can people please recommend a wireless PCMCIA (I think??) card for me to put into my laptop so I can get closer to the theoretical maximum of 54mbps?

I am currently looking at these on Trade-Me (like E-Bay for NZers): Any suggestions?

Netgear Wireless-G PC Card WG511
Belkin Card Bus- =0= New Wireless Notebook Network Card for sale - TradeMe.co.nz - New Zealand
D-Link AirPlusG Notebook Wireless Adapter DWL-G630
D-Link XTREME-G DWL-G650 PCMCIA ADAPTOR 108MBPS
Belkin Wireless Laptop PCMCIA Card - Belkin Wireless Laptop PCMCIA Card MIMO lordtyrant for sale - TradeMe.co.nz - New Zealand
Linksys Wireless-G Laptop Card Adaptor
WPC54G version 3
Linksys Wireless N Notebook Card WPC300N-UK


I was thinking I would go for the Linksys Wireless-G Card Adaptor- because the other two things on my network are Linksys...

What I am most concerned about is reaching the 54mbps, or as close as possible. And to do this I need better reception/signal than what I have. This only has to go through 1 wall...about 15-20 metres..but it must have excellent signal...

Any suggestions?? I will certainly look at other suggestions too- up to the $80NZ mark...if you can post links, please post to NZ sites to make it easy for me to buy.

Thank you very much for your time.