Hi guys, A long time lurker on this forum but a first time poster. I look forward to many fruitful discussions in the future. I currently ride an old Giant Boulder SE that I inherited. It has served me well but the problem is that it is too small for me. It is a medium and I am more suited to a large or even extra large. I am 1.85m tall with an inside leg of 87cm and weigh around 78kg, so feel free to comment on your recommendations on the best size suited for me. I am currently a purely social rider but would not mind starting to do some races. I am currently not confident in the bike and I also find myself getting a sore back etc when riding any distance (which may be a consequence of the small bike?). So I am now considering a new bike. It was never my intention to spend too much but, as is the norm, as you start looking your budget seems to increase as you desire better and better. I initially considered second hand until I saw the Titan bikes mentioned in the title. So I am happy to accept advise on other bikes to look at but I was also hoping for feedback on which of these I should go for. Budget around R4k. Titan Elite 2011 spec TITAN 6061 DB DISC Size 21.5 Color MATTBLACK/RED/WHT Fork SUNTOUR XCR R/L BB Set SHIMANO B-Lever TEKTRO DRACO Brake-F TEKTRO DRACO 180MM Brake-R TEKTRO DRACO 160MM B-Cable attached Chain SHIMANO HG-53 Chainwheel SHIMANO M430 44-32-22T DERA-F SHIMANO FD-M430 DERA-R SHIMANO RD-M430 Freewheel SHIMANO HG-50-9 Grip TITAN PRO H-Bar TITAN TRAILBAR 31.8 H-B Stem TITAN ALLOY 31.8 Head Set VP Hub-F SHIMANO M475 Hub-R SHIMANO M475 Pedal VP ALLOY Rim ALEX TD-17 Titan Sport 2012 spec Frame TITAN 6061 DISC Fork SR SF11-XCM-V3 MLO 100MM (BRONZE Stantions) BB Set FEIMAN B-Lever DRACO WHITE Brake-F DRACO WHITE Brake-R DRACO WHITE B-Cable BLACK Chain KMC Z7 Chainwheel SHIMANO M171 42-34-24T DERA-F SHIMANO M190 DERA-R SHIMANO RD-M410 Freewheel SHIMANO HG-30-8 Grip TITAN PRO (WHITE) H-Bar TITAN water decals H-B Stem TITAN (WHITE) water decal Head Set CONE (white) Spacer 10mm WHITE w/ printing Hub-F TITAN DISC Q/R (KT-WHITE) Hub-R TITAN DISC Q/R (KT-WHITE) Pedal STEEL Rim DS-21, EYELETS (WHITE) Saddle TITAN COMP Seat Clamp TITAN PRO with Q/R Seat Post TITAN water decal Shifter-F SHIMANO SL-M360 Shifter-R SHIMANO SL-M360 Spoke BLACK STAINLESS Tire-F Schwalbe Rapid Rob 2.25 Wire Tire-R Schwalbe Rapid Rob 2.25 Wire Anything in either of those specs that makes the one a definite choice over the other. I'll let you know the price difference after a little bit of feedback Thanks in advance.