Thanks for all your replies!
I just try to get as much information as I can to make the decision. Of course the temptation is there to go for the "big plane" immediately, but then there is also the more reasonable thought to take the job with a solid airline with a good reputation. On the other hand, investing in a rating for an "old" 737-300/500 raises some doubts as well. I am not sure if I would get double rated (737-300/500 and 737NG) with Thomsonfly.
Any further comments are highly appreciated!
(Servus Heimata
)