I have mixed feelings about the modern options.
I purchased a caanoo to emulate consoles while traveling, and for this reason I will prob never want/need to play a turbo express (or an LT for that matter). The fact that the screen on the caanoo is worlds better, and that it does not need batteries really makes that decision pretty easy for me. Save states are also nice
The authentic TurboExpress experience is cool, but IMO it's just too crippled by said factors, making the emulation option a natural evolution for my gaming enjoyment.
For console gaming though, I have no desire to play turbo on anything else but my original Duo or PCE-CD setup. The enjoyment of using the real hardware with real software just can't be replaced. The main difference between this and the caanoo/express replacement is that console gaming has no inconveniences in my eyes.
As far as buying games, at this point I won't buy a loose HuCard now that flash cards are so easy to use. I still buy plenty of games, but if they are easy to emulate, I may as well spend a little extra to get the manual/case if I am going for the real thing.