Digital BW, The Print

After stumbling around photography groups and finding a whole heap of 
trash, it was refreshing to find a group ( this one) that shows an 
impressive depth and knowledge in the inkjet field, making myself, a 
photographer with 20 years experience in the traditional field, feel 
like a babe in the woods . It is with hope that I tentitivley ask if 
there is an inkjet out there that can handle a light commercial load 
of printing that has sufficient fine detail (lack of dots, artifacts 
etc) to make prints ranging from 8"x10" up to 24" wide with good 
longevity and reasonable speed(no more than 20 minutes for a 20"x30") 
The problem with the larger plotter style inkjets (24+" wide), is 
that they look OK from 7 or 8 feet away, but if you had to print 
8x10's on the same printer and view at arms length, it breaks down. I 
print 20" wide on a Hope RA processor and am wanting to find an 
inkjet replacement soon. I am unwilling to take a step backward in 
quality however, on the other hand, I don't see the benefit of the 
1440plus dot quality.I do only  B&W sepia Portrait . I have seen 
results on textured paper with the smaller A-3 printers that made be 
go  watery eyed, but I would go broke waiting for them to print out. 
Who likes plastic paper, I  certainly don't. Can anyone help.

Regards Garry Sarre