Need help on which laptop processor and wireless card to get?

my budget is under $1000 so Im either going with a Intel® Core™ 2 Duo T5900 (2.20GHz/800Mhz FSB/1MB cache) and then a Dell Wireless 1397 802.11g Half Mini-Card or a Intel® Core™ 2 Duo T5800 (2.00GHz/800Mhz FSB/2MB cache) and a Intel®WiFi Link 5100 802.11agn Half Mini-Card. Basically my question is, is 2.2g800mhz that much faster than a 2.0g and is the 5100 wirelss that much better than the 1397?