Anybody considering a BA job would do well to seriously consider the points WWW raises. Command may not be everything but when it is going to be in excess of 10 years it is worth thinking about because you will get fed up in the right hand seat long before then.
The difference between the bottom of a BA seniority list and a fixed roster pattern like Easy is considerable. You should also do the sums and see how long it would take for BA FO pay to match Loco command pay. The answer is a longtime, and worth bearing in mind with mortgage issues or school fees to pay.
A few years ago for anybody in there early 30's it would have been a straight forward decision, but not now. If you join at your 38 point and want longhaul you will spend the majority of your career at BA in the bottom half of seniority lists which is significant. If you want shorthaul don't rule out the locos. There are negatives as with any company but there are also alot of positives.