You'll get responses of everything from HP to Dell to build your own, and everything in between.
If you work for a large company, then they may already have their own server standards, and probably a name brand like HP or Dell. HP is my vote, by the way. But why can't you ask your corporate IT for help? I KNOW they'll want to control everything and host it in their datacenter, but if you insist this is strictly development and/or pre-production work and you need direct access and control of the server, then they should finally concede and help you out.
Also, if this is a lab or a development function, then consider virtualization where you can create virtual machines for a given project or function and if it doesn't work out, re-provision a new one.
And you'll need to decide some other things before selecting the server: like O/S or O/S'es (I assume Windows Server 2003 or 2008 since you mentioned MS Access, and by SQL did you mean MS SQL Server?); what about disk subsystem, i.e. RAID, hot-swap, disk capacities?; and of course the all-important question, budget?!?; Do you have a server cabinet to put this in or will it be tower server(s)?; Is this a development server running only dev and pre-production apps or will it be hosting production apps?
So having said all of that, I'll forego suggesting a server (minimum HP ML350 G5 tower or HP DL380 G5 rackmount w/2x 72GB SAS plus 4x 146GB SAS, oops were my fingers typing?).