Few moments of play then crash

[ssgtlaatz]

So I was having trouble with MASSIVE lag. I ended up dumping my computer and starting over. Now, the lag is gone, but my FTB MC Ultimate keeps crashing after just a few minutes. There is always 2 entries in the crash folder:

http://pastebin.com/embed_js.php?i=D6VsrvsL

and

http://pastebin.com/embed_js.php?i=6ExQ4MGS

So dang frustrating... Please help!