Currently i have a 48 atrox adv in Tower of Train Wrecks and was curious as to where the next place of grinding exp was?
http://aowiki.net/Dungeons has a good summary, with level ranges.
The next large static dungeon would be Biomare. Crypt of Home starts with significantly higher mobs than Biomare and has doors that involve levers, timers, and ambushes -- soloing it is a lot tougher. Also, pickup groups are harder to find.
The Cyborg Barracks and Steps of Madness are unrewarding in terms of XP and loot compared to alternatives and are virtually abandoned.
In any event, though, dungeons aren't the best places to go if grinding XP is your main intent. Yes, spawn rates are high, so you can fight constantly, but mobs have more health than elsewhere for the same XP. Densely-populated outdoor camps and terminal missions provide more XP-efficient mobs to kill.
or where there is someplace with better loot (it all seems to be no-drop)
It depends what you mean by "better". ToTW holds a greater number and variety of performance-boosting items than the dungeons just after it, especially if you are a melee profession. If credits are your goal, on the other hand, most anything else is an improvement. (Bring lots of backpacks to Biomare.)
if anyone has suggestions please include maps or detailed info on travel
Biomare:
Dungeon entry is a door marked "Foreman" in the middle of a mining outpost's west wall. To get to the outpost...
Clan/Neutral: Whompah from Athen to Bliss. Run southwestish to the main road (for safety), then a loooong way west. There's a mining outpost surrounded by dry hills that come right up to the road. Turn south into it.
Alternately, get yourself into the Fixer Grid and take the left Longest Road exit on floor 6, which puts you just west of the outpost.
Better yet, get the item from Biomare itself that lets you teleport there from Borealis.
Warning: Watch the guards, they're Omni-aligned and will shoot Clan on sight.
Omni: Whompah from 2HO to The Longest Road. (2HO itself is at least 3 jumps from Rome any way you go.) This puts you directly into the outpost.
Crypt of Home:
If your Computer Literacy is >250: Grid to Broken Shores. This puts you in the City of Home. Follow the road west out of town, it's a short northward-turning run to the Crypt.
If it's not: both Clan and Omni have Whompahs into Broken Shores. From the Omni one, follow the road west, then keep going west cross-country after you cross the river. From Clan, run southwest cross-country until you hit a dirt road in the desert, then follow it south.
Warning: Running from either Whompah involves going through 25% suppression gas areas.
)that I can think of off the top of my head for an Advy) in Crypt of Home (again, not much pointed towards Advy only equip but decent items) but I don't believe the xp off the mobs there (besides bosses) are very good at all. However, theres Claws (lvl 85ish in Pleasant Meadows - N of Trade Grid, E of Harry's grid) and Hackers (lvl 90-110? I think). From all the times I've checked Claws are never camped, and from the times I've played every once in awhile theres a clan team as well at hackers. 
