More information on elite status/class of service/loyalty programs/location you are originating from would be helpful.
UA has two daily flights, the business seats they have are adequate, probably best if you are traveling as a pair. Meals/inflight service isn't so great, nor is the IFE but they do have wifi on pretty much every sCO 777 at this point. Lounge at EWR is nothing special, Dan Lounge at TLV is also nothing special.
DL is probably best if you are flying Y or a solo J traveler. Wifi is more hit or miss.