Hardcore racer here too - although I'm not spending as much time as I'd like to... thank my 2 kids, wife, job, and commuting time for that
In the winter, I run our local offroad and onroad series, all on non-permanent tracks - unfortunately this is my only driving in the winter, we have 8 races in 6 mths and alternate between both categories.
For offroad 2WD I have a B4.1, I was using a B4 till the 4.1 came out. I recently put the +8 chassis on it but frankly the difference is less than obvious... I'm still battling with the same guys despite the third of an additional inch to the wheelbase

Car has a 10.5 Orion in it, HW xTreme stock speedo, 1251MG savox servo, and a variety of Lipo's.
For offroad 4WD I drive a B44.1, I started using it this season to maximize driving time. Problem is, we race both 2wd and 4wd the same day and alternate series, so it all messes my driving up as 2wd and 4wd require very different driving techniques! I am mostly a 2wd guy to be honest, the 4wd "brutality" doesnt excite me, 2wd is so much more subtle and "on the edge"... Gear is HW Xerun120A V2.1, Orion 4500 molecular lipos, Ace 1013 servo, Team Powers 8.5T.
Here are my 2 offroad babies in their racing livery,
had to crop that one from a group shot
For onroad, I use my trustworthy xray T3 2010... it can keep up the pace with the more modern cars, although I could maybe pocket a tenth or two with a more flexible, fuller chassis. Esc is a TeamWave RB50 with RBS software, this is basically the first speedo that came out with variable timing and a programming card, before the HW ones, it still holds its own nicely against anything on the market. This season the spec motor is the TOP 13.5 (Orion is the series sponsor), spec tires is MM32, I run the same KO 2365 servo that I bought, what, 6 yrs ago, and Orion 4500 Molecular lipos. Sorry no pic I'll try to get one later... the car is honestly up to the business, and it's refreshing to see that design has kinda stalled since 2008/2009 I'd say.
Paul
AE RC10 - Made In The Eighties, Loved By The Ladies.
Blue Was Better - now, Blue Is Bankrupt.
Facebook affiliate program manager: "They go out and find the morons for me".
Life is short. Waste it wisely.