I'd go with the G4 Tiger. I have the Delight, and it's okay but nothing special. I could take it or leave it really, and I rarely find myself wanting to use it. As for the Ina... it's Lelo, and I find that Lelo toys typically lack power, whereas Fun Factory toys are generally very powerful.
I have both the G4 Tiger and Ina. If you're looking for clitoral stimulation and don't mind some pressure I'd go with Ina 2. The G4 Tiger's clitoral nub can reach my clit, but not near as easily or targeted as my Ina 2.
I had the Tiger and the charger went out. I had trouble with it since the start but I'm bummed about it. I don't know if I want to replace it or not. I have the G-Ki which many reviews compared it to the Delight, which was on my wish list. After reading more reviews tonight, I have decided not to get the Delight (or at least right now) because that seam. I'd go for Ina.
I have all three and I vote Ina 2. I like Tiger when I'm in the mood for something large (but it basically gives no clit stimulation), and Delight is nice when I'm in the right kind of mood for just G-spot stim (again, for me, it doesn't hit my clit), but Ina 2 is the one I use most often. It's a more reliable, easy G-spot + clit orgasm-inducer.
If it were on the list I would pick the Jopen Vr7, but the reason I use it most is because I prefer rotating G-spot stimulation, and the clit arm is more powerful than Ina 2.
I think Ina 2 has to fit you just right for you to love it. I have a pretty shallow G-spot and Ina 2 just hits it, and I have to push the clit arm around a little to get it in the right place.
Out of these, I'd choose Ina 2! I have the Click N' Charge on my wishlist, but chose to buy Ina 2 over it a couple weeks ago. I think it looks like it'd be even more fun than those two, but Delight Click N' Charge is another I really, really want too. I'd have to go with one of those two, though.