Land Raiders will be a more attractive option when the 5th Edition 40k Rules are released -- so long as the rumours are fairly accurate. Also Land Raiders are lots of fun and "just look right" in Apocalypse games so for now there's that.
Agreed, Legion-Brother!
I find standard landraiders just don't fit the bill for anti-tank work. I try to match up my tanks against infantry units (especially mechanized advancing ones) that have little in the way of anti-tank. I include units that have melta guns in this one if I can safely stay out of their range while engaging them. Ditto for my devastators. They nail the ordinance tanks, standard tanks, and then anything that's a big threat after that. Tanks can not slug it out with anti-tank infantry units.
Ever thought of using a Crusader? You could convert one using 6 storm bolters from the vehicle accessory sprue or trade your friends' bitz box. I myself have one for my Space Wolves army (think 15 bloodclaws...)
But my all time favourite (and most useful IMHO) LR variant is the Prometheus.
Granted its, Forgeworld, but FW rules for variants of existing vehicles are not overpowered.
You get FOUR twin linked heavy bolters and a storm bolter.
That's averaging 10.5 hits out of twelve shots, being able to move 6"and shoot for full effect while still retaining a transport capability for third of a marine more than a much shorter ranged Crusader. It I don't think there anything that touches its anti-infantry/skimmer capacity for only one FOC slot.
Just remember to have more threatening units on the field for your opponent to worry about and shoot at.
I like to use my tank(s) as clean up boys for my dev squad(s). They sklk aroudn out of LOS until they can deal with an isolated portion of an opposing army. They deal with the flankers and deepstrikers while much tougher, more effective firepower unit(s) get placed in commanding fire lanes to duke it out with my opponents top units.
You would be surprised how survivable a tank can be when you play conservatively with it and don't expect it to blast everything in sight and dominate the board.
That's usually what happens because red shirts get rookie pumped to buy one after explaining how "killy" it is.