It's a bit like asking whats the best car, ask 50 people and you'll get 50 different answers!
Below £100 - Hq Jive and Maestro would take you much further than the Javelin.
Between £100 - £150ish - you have stuff like the Eolo Over & Neox ( from Ebay) or the HQ Infinity or Maybe the new HQ Crackerjack which looks good and is supposed to be a good allrounder but I haven't seen any tests yet.
Over £150, well theres loads of choices - Kitehouse Sin always gets good reports, the Benson Deepspace Or Jest of Eve Talon are excellent, R-Sky stuff, the list goes on .... it depends what you like the look of. Now you have the basics it really is worth spending money on the best kite you can afford, it really will make it easier to learn.
DVD's - Flight School by Dodd Gross and Trick or Treat from Tim Benson are both good. On Youtube search for DPmama74 - Martin Madsen or check out Randy G's tutorials
http://v2.1.kiteclique.com/wordpress-3.0/wordpress/tutorials/randygs