For an office system you can go in for a "fairly powerful cpu" platform. no need for "very high" speed cpu. also the onboard graphics should suffice.
RE: LCD monitors., i truly believe that the age of CRT monitors is over. the prices of 17 inch lcd's have come down to $200. so here locally it should come down to 15K soon, from the current 18 to 20K ( not sure of these)
NB* : 17" lcd =19" CRT (approx) , actual display / viewable area.
considering the prices of a 19" CRT the difference is not that much.
As darky has mentioned above ASUS and , many top-tier co's have entered the SFF field . MSI, ABIT, Shuttle et al.
i am sure if you do enough "research" you should be able to achieve your objective.
ps: if you do not want to do "research" just visit newegg with ur CC.