iPhone App for reading 160 MB chm file

I've got this massive 160 MB (3000 pages) textbook in chm format and I was wondering if the current "chm reader" apps available for the iPhone are robust enough to handle it.
A quick skim through the "Apple Store" produced three promising solutions: CHMate, iChm and ReadCHM. The first two seem very robust, although only CHMate seems to support the "search text in page" feature (which is a must for me). ReadCHM has some nice looks but it doesn't seem to be as sturdy as the other two.

Any thoughts?

Thanks in advance.