Buy NGV OK???

Hello, after four years of vitara abstinence, I want to get a new one again. Planned model NGV Diesel Comfort+ in white. The 2nd test drive impressed me overall and compared to my three previous models. Especially between the driving characteristics there are worlds. The only criticism that leaves me still hesitant is the rather grim diesel. It could be a little more power. Now my question: Does anyone from Suzuki know if a stronger diesel is planned soon? How are your experiences with an increase in performance (chip tuning)? The dealer has granted me 17% discount on the purchase, including free family package. (Back seat DVD Player, cooler, running boards, etc.) My almost five-year-old, (Passat V6 4motion) he also takes quite well into payment. 1200€ One year insurance is free, and leasing for 3 years to 0%. I have not even tried to do so. Did he offer me in the first interview. your experiences regarding the current pricing? Is the offer OK?, or is there anything else in it? Thank you for your answers and assessments