I have 3 options and they all cost pretty much the same. Im big and tall so leg space is very important to me, also service! But most important that it is on time! So wich one should I go with? Any experience you have I would like to know, I hear Delta is always delayed on domestic flights ( just browsed around o the web)
If you're sitting in coach class, you're going to get the same seat pitch (i.e. leg room). You could of course depending on frequent-flier miles, etc maybe get an exit row. Depending on the load factors of your flight, you might not get those certain seats if someone with a higher priority than you asks.
If you're sitting in business/first class, you can't go wrong with any of those. You'll be fed (probably several times), have access to whatever alcohol you want and be sitting in some pretty comfortable seats. All those widebody's will have seat entertainment.
In regards to on-time performance, there are way too many factors out there to narrow it down to one airline. If you pick the best on-time airline, and weather rolls through your destination, you're probably going to arrive late. Take that whole Virgin Atlantic debacle for instance - they are usually highly regarded by customers, but they ended up picking a crappy weather alternate airport for an international diversion (BDL - Bradley in Connecticut) and got hosed by US Customs. I would just pick whatever airline you think you can rack up the most frequent flier miles on.
Regards,
Randy