I have built several F-14's A's and D's both in 1/72 and 1/48, Hasegawa, Revell, Hobby Boss and Hasegawa is the best in details. Hobby Boss in the 1/72 scale version is pretty nice and has a full weapons load but would recommend an Eduard PE set to dress up the pit.
Another VERY nice 1/72 Cat is the old Revell # 6866 released in 2002 and the re box version done by ROG in 2008 as # 4932. They are cheaper than Hasegawa and pack really nice details specially in the pit with crisp molded details. All weapons and excellent decals are also provided. You can find them at shows or on eBay:
www.scalemates.com/.../111412-revell-04195-f-14d-super-tomcat
www.scalemates.com/.../146649-revell-6866-f-14d-super-tomcat
Here is the Revell in 1/72 with some Hasegawa weapons. The kit brings the usual Sidewinder, Phoenix and Sparrow load but here I used some JDams and Lantirn Pod to change the flavor a bit.
Hope this info helps.