Dells are junk. Avoid them at all costs.
I am also curious as why you would say this.
I'm another satisfied Ultrasharp user.
Would not call them junk, they are good value IPS panel, if you do not want to spend a fortune on a super pro monitor, then why not ?
I work both a Dell 2709W (PVA) and a NEC NEC PA271W (IPS). The most obvious difference is the resolution (1920 vs 2560); yes the electronics and colour fidelity are better on the NEC, but I got the DELL for 500 Euro while the NEC is 1000 Euro, so for the price, it's very decent. Though the finer pitch on the NEC shows more appealing images, the 16/9 format is clearly a step back from the 16/10 of the DELL.
If you have space on your desk, and are on a budget, the DELL 30 inches might be an option. If you want absolute professional quality, then go for a NEC spectraView 30 inches or the Quato Intelli Proof 300 excellence.
IMO, 16/9 format is not a good ratio for photography, hence I am advising 30 inches screens for a more comfortable 16/10. My next screen will be for sure a 30 inches.