My two cents:
Land Raiders are only worth it if taken in multiples (and,
IMHO, the only variant worth taking anyways would be the
LR Crusader, just give it smoke...), otherwise you end up with ONE big fire-magnet that will draw tons of fire and will probably never accomplish its job (which,
IMHO, should be transporting troops FIRST, and giving fire support SECOND...).
I used to run with 2
LRCs at 1,500 pts or below, and 2-3 at above 2,000 pts. with the Codex: Armageddon Black Templars. One of the lists we've theoryhammered for the new
BT is the 4
LRC list (all dedicated transports for 5-man shooty lascannon squads, with 2 or 3 Predators or something...different concept altogether, but the basic point is there: multiple Land Raiders).
That aside, AV14 is still a tough nut to crack, especially if under smoke or cover. Land Raiders are pretty resilient, but, unless fielded in multiples, are,
IMHO, quite useless.
Terminators...Unless your list is centered on them, or you're using Grey Knight Terminators, I never think that they're worth it. Then again, of late, I mostly play Eldar, so I may be a bit biased (then again, with so many AP2 weapons out there present in many lists, Terminators often feel too expensive for what they do...unless they're Grey Knight Terminators. Oh, and I run Iyanden, so I guess that means I'm practicall using Termies, right?
).
I have a lot of respect for
GK Termies for the simple reason that they strike at initiative, have high strength, and are quite a steal, points-wise and efficiency-wise, when compared to most other Terminator-type units (wraithguard are hard to use efficiently, obliterators are point sinks, etc...).
So,
IMHO, unless you're running Templars or Terminator heavy armies and using multiple
LRCs as transports, I'd go look elsewhere for resilient transportation. Rhinos still work, by the way, but you just have to field lots of them (an
SoB list I made uses at least 6 rhinos, 2 immolators and 2 exorcists, I think...so that's a lot of vehicles to shoot at. Marines could do something similar, too.).
Marines on bikes are fun, too!
(recently tried a 30-bike, 5 of which are attack bikes, list using the new White Scars rules in the new codex...still works
)
Just my two cents,
Farseer Iakobos
Craftworld Iyanden
Soon-to-be Death Korps of Krieg...or Tanith First-and-Only commander
...Maybe White Scars, too...