I agree with you on the indexing, there is very little in the way of advanced searches. Gazza has responded to a message of mine regarding plurals in the search but i do think it needs a major overhaul, especially if the site is to grow as once you get nearer to million+ auctions it will be important to break down searches to be more specific.
If you include the laptop specs in your item description, I think you can tick the 'Search Descriptions' box and find particular words. Although i'm guessing that will be very sensitive too (i.e. with plurals, etc.).
For now We'll have to sit tight and wait for search improvements :-)