Hi Shan and Angrycolon, nice to see you posting in the forums.
On the neck question, it is likely going to come down to the wood chosen for the neck. As you might guess some woods have greater strength and rigidity than others, and some are chosen for the tone that they impart (which is more in the acoustic models rather than in electrics). For a thin fast neck I tend to be partial to rock maple in a 3 piece laminate a-la Gibson and some older Epiphones... guess that's why I own one. Some of the Fenders have Ash which is quite dense and heavy, found commonly on older Stratocasters, as well as Maple. Mahogany has good straight grain and light weight along with reasonable tone, but requires more mass because of it's flexibility. In the end it is going to come down to what feels right for you, and shopping around making note of what you like and don't will give you a better idea of what to look for when you get really serious about laying down the hard cash.
If you are really fond of the Washburn you have, you might do a little shopping on the Internet at places like Warmouth and see if they make a replacement neck for the body you own in a profile and material you like.... could save a few bucks and finish out to one sweet axe!
Take Care, and keep in touch;
Doug
"what is this quintessence of dust?" - Shakespeare