If the DPO3014 seems right enough to justify the cost, go with it. My only gripe with TEKs is the small record length. 2500 slots per channel is typical, and quickly becomes a real limitation. I'm not familiar with the DPO, though, and if it has adequate memory in it for your needs then don't worry about it.
I have a TEK TD2048B which hardly ever sees light of day anymore, my home bench is light on space. I use a Hantek DSO1060 on my home bench now. It is 60MHz, 2 chan, battery operated for true portability, has loads of features - all for less than $600 at Global Specialties. Nice thing is, it also has a decent multimeter built in. It lacks the WaveInspector feature. It does have several automatic measurement capabilities, for voltages and timings.
IIRC, the DPO stands for "Digital Phosphor Oscilloscope". The phosphor part refers to the ability to show multiple traces, old ones slowly fading with each retrace. The Hantek has this feature. This is an aid to show the operator "trends" in the signal as it changes continuously. This used to be the main justification for buying the old phosphor screen o-scopes, as the user could see things over time that are now easily doable with digital scopes and their data logging capability.
Later.
kenjj