Bictonmike,
ive been in same place as you this time last year, fresh back after 10 - ish years off. its definately like riding a bike, it just feels like you never stopped, however....... be prepared for some short sessions to start with, its kinda hard work cause you'll be fightin things to start
i was on a 8'2" 60 litre twinser 12 years ago, but current board, 93 litre EVO much better choice for now 83kg of relaxed fat and gristle. so i'd say 110 and up for you.
to be honest ive found the sail & mast harder work to source than the board, but there are plenty of boards under $200 if you LOOK around. the forums not a bad place to start. decent 5.7m+ sails not overpriced a real prob

my whole kit was around $600, including 2 sails and a new springsuite and harness.
theyre out there..
but possibly so am i