Join Date: Jun 2010
Location: 1 14 N 103 55 E
Bikes: 2010 Trek 7.5 FX
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I will comment on the Trek models (no experience with Ideal)- as I have just gone through a similar process, deciding between the FX and the 7000 series.
First off, if your budget allows, I would remove the 7.1 FX from the equation, as the difference in 50 Euros gives you a better bike overall. The 7.2 FX has the advantage of Alpha Black Aluminum (over the 7.1's Alpha White) and a better drivetrain, among other things.
Comparing the 7.2 FX and the 7200, the main differences appear to be the frame (Black for 7.2 and White for the 7200), and the mechanical lockout suspension of the 7200. The suspension will also make the 7200 a heavier bike if you need to carry the bike. The international versions of the 7000 series appear to have less of an upright position (25mm rise against 50mm rise- making a guess here)
While both the FX and the 7000 series can be ridden on road and some trail, given the riding you do (majority paved), the 7.2 FX appears a better bet, as the suspension of the 7200 will be of more use to you on dirt than road (only my opinion), and the better frame may help in the long run. (Do a search on the advantages of Trek Black aluminum in the forum).
Trek also provides a good warranty for their bikes, so you should be covered for the next 3 years.
But, most importantly, go to the nearest store and do a test ride. Whatever opinions you form from advice you get here cannot compare to an actual test ride.