Reaver pro is built on the old MKIV pineapple plat form: The pro version offers nothing more than a GUI i would invest in the Pineapple mk5 with the command line version of reaver same results but more versatility. Cheaper too.
There use to be a key logger infusion for the mk4, I don think they have one for mk5 but look at this you may be able to use it to inject you own keylogger code
https://forums.hak5.org/index.php?/topic/30673-strip-n-inject-sslstrip-code-injection/
It depends on what traffic you want to monitor..???
If its url then use the URL snarf infusion if it is passwords then use the ssl strip infusion if you want all traffic except encrypted the use tcpdump.
here you go
http://www.ebay.com/ctg/Sony-VAIO-UX-Series-4-5-40-GB-Intel-Core-Solo-1-33-GHz-1-GB-Ultra-Mobile-PC-Silver-VGN-UX380N-/118315083#req_6_all_qqq_qqq
http://www.amazon.com/Sony-VGN-UX280P-4-5-inch-Laptop-Processor/dp/B000IALP88
its a sony p series prototype they were released outside of the US and a few beta testers in the us got them not sure if the are released now or not.
http://www.ebay.com/itm/Laptop-Lifestyle-SONY-VAIO-VGN-P21Z-R-WIFI-3G-FREE-UNLOCKED-/181268124550